Supercharged K20a2 Vtec - Race Spec by cptkirk

5 minute(s) of a 377 minute read

If it aint finished by the summer someone come and shoot me.  

I do plan to get over to the ring, I have a mate who is bang into the ring, he buys a season ticket & shares a tricked out scooby with his mate that lives in Luxembourg and they are getting 8:15 round it and he is always talking about getting the mini over there, plus my brothers into fast bikes and he plans to go over this year so need it ready for May time really - it is acheivable......I just need to extract the digit.

2-1-2010

The weekend was fruitful.

I managed to strip off the supercharger and manifold and got to the heater matrix pipe that I wanted to remove. Not without its problems I hasten to add, you forget how much stuff needs unplugging before you can get the S/C off, also the fuel rail needs to come off, which allowed me to fit some braided lines to it - bling....

In my quest to delete the unwanted pipe I stumbled across a part that I had made that I forgot to post up on here. It is the connection between the vlave cover and the air intake. Some might disagree with what I have done and say that the only reason that you breathe the valve cover back into the air intake is for emissions. On the other side fo the coin a very good reason for breathing into the air intake is the same reason for a PCV valve (positive crankcase ventilation), it creates a vacuum for the rotating parts to work in, especially good for high revving engines.

Not much to look at but you get the idea:




So I took off the old solid pipe I have been going on about, I had a good measure up and then got designing a bung for it, I was thinking somehting similar to what you can buy from k-tuned.com but then I realised that there was a floor in my thinking as the filling of the coolant system is different to that of the civic and that currently the coolant is fed to the pipe that sits just outside the thermostat, so in theory the coooant will fill the front-back coolant lines and the radiator, however I am not 100% confident at its ability to fill the block. So I decided that the bung was now going to be a second filling point in the system. I drew up a design and got my good mate Stevie G to turn it up for me, while he was at it he also turned the bung for the rear of the block (heater matrix output from the block - M20x1.0). Utilising the o-ring that was on the original pipe I have got a second feed. All I need to do now is fit it into the thermostat housing, pilot drill a hole then tap it out to ensure it doenst pop out under pressure.......

Supercharger and manifold off and onto the bench:





Old Solid pipe removed from the equation:




New filler bung in its new shiny glory:









The new heater output bung, also in its new shiny glory (thanks to Mike at K-tuned for telling me the size of the threads, even the guys at Honda couldnt tell me):








And here they are ready to go in, I only offered them up as I have some other work needs doing before I install them:








The assault continues..................

On the subject of the valve breather, in an ideal world you would send the blow by gasses via a catch can. I do intend to do this in the future and after lots of research when I had my back op I have designed my own catch can, right now its a distraction that I dont need so it will have to wait til the car is finished, then I will fabricate one for testing. Trust me when I say its not the usual BS catch can you buy off ebay, its foundations are similar to catch cans used in aeroplanes and helicopters. This should stop the engine pulling in loads of unwanted oil into the combustion chamber.